.input-group {
        width: 500px;
        margin: 50px auto;
        overflow: hidden;
        border-radius: 5px;

      display: flex;  /* 设置 flex 布局 */
        flex-direction: column;  /* 设置主轴方向为垂直方向 */
        justify-content: center; /* 将子项在垂直方向上居中 */
        align-items: center; /* 将子项在水平方向上居中 */
}

      textarea {
        width: 300px;
        padding: 12px 20px;
        margin: 8px 0;
        display: inline-block;
        border-radius: 5px;
        border: none;
        background-color: #fff;
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
        resize: vertical;
        font-family: Arial, sans-serif;
        font-size: 16px;
        line-height: 1.6;
        color: #333;
      }


      textarea:focus {
        outline: none;
        box-shadow: 0 0 5px rgba(0, 123, 255, 0.7);
      }

      label {
        font-weight: bold;
        display: block;
        margin-top: 20px;
        margin-bottom: 10px;
        font-size: 18px;
        color: #333;
      }

      input[type="submit"] {
        border: none;
        padding: 12px 20px;
        border-radius: 5px;
        background-color: #07c;
        color: #fff;
        cursor: pointer;
        margin-right: 10px;
        transition: all 0.3s ease;
      }

      input[type="submit"]:hover {
        background-color: #0fb9b1;
      }

      input[type="reset"] {
        border: none;
        padding: 12px 20px;
        border-radius: 5px;
        background-color: #ccc;
        color: #333;
        cursor: pointer;
        transition: all 0.3s ease;
      }

      input[type="reset"]:hover {
        background-color: #999;
      }